Warning! This post contains an early spoiler alert.

This is the plot in FNaS Fiercy Forces, where Infinite's Replica
strikes back to take the "revenge" on Silent.

But this time... It is a different kind of rematch.

In Sonic Forces "Different Dimension" (In short):

At the end of the fight against Sonic and Silent.
When Infinite was about to be absorbed along with Phantom Ruby into the Death Egg Robot.
He casted a Delusion Energy Cube, but Silent did not feel nor even saw the secret attack. The Wild Lynx take on the forced delusion, causing for her to have:
"Red Phantom's Infect Effect".

Thanks to this trick Infinite still lives in Silent's Memory as the "Realistic Replica".
He wants to strike back by connecting and appearing in Silent's favorite game...
the Heroine was supposed to play after returning home.

And it was a Game named: Five Nights at Sonic's Maniac Mania...

"Absolute Zero" Ending:
Infinite's Replica doesn't want to defeat his foe.
But as the fully bringing back his real self to existence...
He wants to ressurect himself by merging with Silent
"The Player" as "The One". That's the only way of his victory
to regain his form and in addition to gain a new power.